landsiedel



H. LANDSIEDEL.

ADDING CALCULATING, AND RECORDING MACHINE.

APPLICATION FILED JUNE 28. 1920.

1,480,088. PatentedSept- 26,1922.

7SHEETSSHEET l.

WITNESS. INVENTOH.

HARRY LANDS/EDEL,

W? BY 7 Q I gm ,4 Imam s.

H. LANDSIEDEL.

ADDING, CALCULATING, AND RECORDING MACHINE.

APPLICATION FILED .IUNEZB, 1920. 1,430,088, Patented Sept. 26, 1922.

7SHEEI'S-SHEEI- 2.

\ n g v INVENTOR.

HA RR) LANDS/EDEL,

. I By M j I I MS MT RNEIS.

WITNESS.

H. LANDSIEDEL.

ADDING, CALCULATING, AND RECORDING MACHINE. APPLICATION man JUNE 28. 1920.

1,430,088, Patentedsept. 26, 1922.

7SHEETSSHEET 3.

WITNESS. INVENTOR.

$44 HARRY LANDS/E DEL,

BY M air HIS ATT HNEYS.

H. LANDSIEDEL.

ADD|NG, CALCULATING, AND RECORDING MACHINE.

APPLICATION FILED JUNE 28. 1923.

1,430,088. PafentedSept. 26,1922;

ZSHEETS-SHEET 4.

WITNESS. IN l/E/V TOR.

HARRY LANDS/EDEL,

H. LANDSIEDEL.

ADDING, CALCULATING, AND RECORDING MACHINE.

[APPLICATION FILED JUNE 28. I923.

1,430,088, 7 v PatentedSept." 26, 1922.

7 SHEETS-SHEET 5.

I'llI'II'IIIII'IIII"IIIIIIIIIIIIIIIIII WITNESS. I INVENTOR.

fi HARRY LANDS/EDEL,

' I BY I zsmmflzns.

H. LANDSIEDEL.

DDING, CALCULATING, AND RECORDING MACHINE.

APPLICATION HLED JUNE 28. L920.

1,430,0 PatentedSept. 26,1922.

7SHEETSSHEET 6.

WITNESS. 4 [NI/EN TOR.

HA RR) LA NDS/E DE L,

. M f 2/3 ATT RNEYS.

H. LANDSIEDEL. ADDING, CALCULATING, AND RECORDING MACHINE.

APPLICATION FILED JUNE 28.1920.

Patented Sept. 26, 1922.

7SHEETSSHEET I.

WITNESS.

S L m M R ll w A m w M wnC v l H r Patented ept. 26, 1922 To all whom it may concern:

UNITED STATES 1,430,088 PATENT OFFICE.

nanny mnnsmnnn, or Nonwoon, omo, ASSIGNOR 'ro THE DALTON nnnma macnmn comamr, or CINCINNATI, 01110, a conclusion or 01:10.

ADDING, CALCULATING, AND RECORDING MACHINE.

' Application filed June 28,

Be it known that I, HARRY LANDSIEDEL, a citizen of the UnitedStates, residing at Norwood, Hamilton County, and State of Ohlo, have invented a new and useful Adding, Calculating, and Recording .Machine, of which the followin is a specification.

This invention re ates to adding, calculating and recording machines.

For conveniencev of illustration and description, I have shown my present invention embodied in an adding machine of the Dalton type. The Dalton adding machine, as shown in the drawings, comprises recording mechanism for recording or listing items or numbers which are involved in the calculations or additions performed by the machine. My present invention is not limited as to its usefulness or design to embodiment in a Dalton adding machine, nor in a machine containing recordin mechanism, but my invention may be use ully employed in adding or calculating machines of a type without recording mechanism.

My present invention comprises mechanism which may be designated generally or broadly as mechanism for subtracting a number from another number or total of greater numerical value previously placed or set up in the adding or calculating mechanism of the machine. While my improved subtracting mechanism may be referred to as such, the process of subtraction involves the placing or introduction into the machine of the complement of the number or item which is to be subtracted from the number or total previously set up or placed in the machine. In a machine containing my invention the I operation of subtracting one number or item from a number or total previously set up or placed in the machine is performed by setting up or introducing the complementary number into the differential mechanism of the machine, and then setting the subtracttion mechanism for operation, and then operating the machine. As a result of this the various mechanisms of the machine are coordinated and cooperated so that the full complement of the number or items to be subtracted, including as many 9s as may be necessary to extend to the highest numerical order within the capacity of the machine, is introduced into the adding mechanism, thereby causing carrying or transferring from order to order as will be readily under- 1920. Serial no. 892,416.

stood, with the result that after such operation the desired number or item has been subtracted from the number or total in the adding mechanism, thereby setting the addmg mechanism to represent the correct amount or number.

It often occurs that in operating the machine to list a series of items, one or more items may be listed erroneously and added or included in the calculations performed by the machine. In such instances the item or items listed and included in the addition or calculations through error may be subtracted, thus correcting the error. In such case it is desirable to desi ate the item or items subtracted so that it may be known at a glance that such items are not included in the calculations listed, but were listed through error and subsequently corrected. My invention comprises means for designating the items subtracted by printing a designating character adjacent to each such item. The mechanism for printing such disting uishing character is arran ed to op Y number is made,it is desirable to prevent operation of the paper feed or line space mechanism during the subtracting operation. My invention comprises mechanism for efi'ectin that result so that the uniformity of ine spacing of thelisted items is maintained, irrespective of-the fact that the complementary number used in a subtracting operation is not listed.

An object of my present invention is to I provide mechanism of the character and operable to perform the results and functions above mentioned, as well as other desirable results and functions, which will be apparent to those skilled in the art from a reading of the following description taken in connection with the accompanying drawings, in which- Fig. 1 is a side elevation of a Dalton adding machine containing my present invention, the case of the machine and a few of the shafts and frame -parts being in section.

Fig. 2 is a similar elevation viewed from the opposite side.

Fig. 3 is a plan view of a part of the mechanism of the machine showing in particular the differential mechanism and the means for controlling a part of the differential mechanism to permit movement of the operating racks for the adding mechanism to introduce complementary 9s into the adding mechanism in subtracting operations.

Fig. 4 is an elevation showing the connections for printing a designating character to designate the subtrahend items, and also for controlling the adding rack in the lowest numerical order as required to add 1 in units order to complete the complementary number as required to render the operation of subtraction proper. In this view of the drawings the mechanism is shown in its idle position.

Fig. 5 is a view showing the same mechanism in operative position.

Fig. 6 is a view of the subtracting key and its connections in their operative positions.

Fig. 7 is a similar view of the subtracting key and its connections before operation thereof.

Fig. 8 is a view showing the mechanism for preventing operation of the line spacing or paper feed mechanism.

Fig. 9 shows an example of the work in subtracting that may be performed by the machine.

The Dalton adding machine in which I have chosen to illustrate the invention comprises a set of numeral keys 1 secured upon key levers 2 and arranged in convenient manner in a key board. The items or numbers struck on the numeral keys are thereby set up in the differential mechanism 3 which, as is known, in the Dalton adding machine, comprises digit stops arranged in rows in numerical order in a movable carriage. After each item or number has been set up or represented in the differential mechanism the type-carriers 4 and their associated racks 5 are operated in the usual way to list or print the numbers on paper fed to the recording type by operation of paper feed mechanism comprising a platen 6 and actuating devices therefor described generally further on in this specification, and to intro duce or add the numbers in the adding mechanism. The type supported by the type-carriers are driven by appropriately mounted hammers 7 as required to list the numbers on the paper fed to the type by the platen 6. The hammers are pivotally supported upon a shaft 8 and are driven against the type at the proper time by springs 9 arranged appropriately for that purpose. Each of the hammers is formed with a latch arm 10 arranged to be engaged as required to hold the same in retracted position by a book 11 on a releasable latch member. The latch members also have arms 12 which are engaged by projections 13 (Fig. 8) on the type-carriers with which said latch members respectively correspond when the type-carriers are at rest in their normal or idle positions. Thus, the latch members for the hammers are held in their lower positions as shown in Fig. 8 in opposition to the tendency of their springs 14 to raise the rear ends of the latches. When any one or more of the type-carriers are moved to recording position the projections 13 on such type-carriers as move to recording position are carried away from and out of contact with the arms 12 of the corre sponding latches, thus permitting such latches to be raised by their springs 14 a sufiicient distance to place shoulders 15 on the raised latches in front of a latch release bar or bail 16. The latch release bar or bail 16 has one end pivoted upon a sta tionary support 17 (Fig. 3) and its opposite end connected with a lever 18 beyond the opposite side of the series of latches, so that said latch bar extends entirely across and above the series of latches. The lever 18 is pivoted upon a support 19 and has an arm carrying a roller 20 (Fig. 8) operating upon a cam 21. The cam 21 is carried by an arm 22 securedupon the main shaft 23 of the machine. The upper end of the lever 18 is actuated rearwardly by a spring 24 and in the normal or idle position of the machine said lever is held in its forward po sition by the cam 21 in opposition to the spring 24. hen the lever 18 is in its forward position, as shown in Fig. 8, the bar 16 is above the shoulders 15, so that the latches cannot rise to place the shoulders 15 in front of said bar 16.

For present purposes it is sufiicient to know that the main shaft 23,01 the machine is turned in a forward direction by means of an operating handle 25 (Fig. 3) or otherwise, after each number is set up in the differential mechanism, in order to permit the proper type-carriers to advance to proper recording position. Such forward turning movement of the shaft 23 advances the cam 21 to position to permit the spring 24 to move the upper end of the lever 18 rearwardly as required to move the latch release bar 16 rearwardly a sufficient distance to permit the shoulders 15 of the latches whose type-carriers have advanced to rise in front of the latch bar. After the shaft 23 has completed its forward turning movement it is turned rearwardly to its starting point, thereby causing the cam 21 to operate the lever 18 whichmoves the latch release bar 16 forwardly, thus disengaging the latches which had been engaged with said latch bar from their corresponding hammers 7 and permitting the hammers to be operated by their springs 9 as required to drive the type to print.

\Vhile the printing mechanism per se does not constitute a tion, the same being the subject-matter of a separate application Serial No. 357,776, eventuating in Patent No. 1,395,121, dated October 25, 1921, filed February 11, 1920, my present invention includes means hereinafter described for preventing release of latches by the latch bar 16 when the machine is used in subtracting operations.

The Dalton adding machine also includes a series of adding pinions 26 arranged to cooperate with the racks 5 in the usual way in adding, transferring and clearing operations. The racks are operated in a rearward direction, as usual, by springs 27 (Figs. 1 and 5) as required to transfer from lower to higher numerical orders. Said racks when not operating in clearing. operations are stopped in their normal or idle positions by lugs 28 thereon engagin the hooked ends of the carrying or trans er pawls 29 which are raised in the usual manner from the position shown in Fig. 1 to the position shown in Fig. 5 in transferring operations. The transferring operations in the Dalton adding machine are well known and do not require further description. My invention comprises means arranged to operate at the proper time to raise the carrying or transfer pawl 29 in the lowestor units numerical order to permit the rack? which operates the units adding pinion to move rearwardly, as though a transferring operation was taking place in connection with the units adding pinion, as required to complete the introduction into the adding mechanism of the full complement of the subtrahend or item which it is desired to subtract from the number or total that had previously been set up or represented in the adding mechanism. This means which is comprised within my invention is hereinafter described.

The Dalton adding machine also comprises mechanism for operating the platen 6 to move the paper in line spacing. As shown, the actuating mechanism for the platen comprises a ratchet wheel 30 (Fig. 1)

on the platen shaft arranged to be engaged by a pawl 31. The pawl 31 is pivotally supported upon an arm 32 secured to'a rock shaft 33. A lever 34 is slidably supported upon a polygonal portion of the shaft 33, extends downwardly, and is actuated in a forward direction by a spring 35. Forward movement of the lever 34 turns the shaft 33 in a direction to engage the pawl 31 with the ratchet wheel 30 so that when the lever 34 is moved back to its normal or starting position the pawl 31 first turns the platen, thereby moving the paper the distance of a line art of the present invenspace, and then diwngages from the ratchet wheel, there being a lateral extension 36 on the pawl engagingunder the arm 32 thereby holding the pawl in a position in opposition to its spring37.

- The Dalton adding machine includes mechanism for effecting the above described operation of feeding the paper in line spacing automatically and as an incident to the operation of the shaft 23. Such mechanism comprises an arm 38 (Fig. 8) attached to the shaft 23 and connected by a link 39 with a bell crank lever 40. One arm of the bell crank lever 40 in the idle or normal position of the machine engagesv a roller 41 on the arm 34 and thereby holds said arm in its rearward position in opposition to the spring as clearly shown in Fig. 8. When the shaft 23 is turned in a forward direction the lever is moved to the position in which it is shown in broken lines in Fig. 8, thereby permitting the spring 35 to operate the arm 34, turn the shaft 33,. and engage the pawl 31 with the ratchet wheel 30. As the shaft 33 is turned toward its startin point the lever 40 operating against the rol er 41 forces the arm 34 to its startin position, causing the pawl 31 to turn the platen and thereby move the paper'a line space. My present invention comprises means for preventing operation of the line spacing mechanism when the machine is used in subtracting operations.

The foregoing comprises a general description of the co-ordinated mechanism of an adding, calculating and listing machine with which my invention directly cooperates. While I have described the co-ordinated mechanism of a Dalton adding machine it will, of course, be apparent that my invention is not restricted as to its use, design and 105 capability to a machine of that particular kind; but it will be apparent that my invention may be used with equal advantage in other machines.

As previously mentioned, my invention 110 comprises mechanism for rendering the machinepractieable for um in subtracting operations. The invention includes mechanism for effecting the completion of the introduction into the adding orcalculating mecha J15 nism of the complete complement of the subtrahend; that is when any number or item is to be subtracted from a number or total previously set up or introduced into the adding or calculating mechanism of the machine, 120 such subtracting operation is effected by the introduction of the complete complement of that number into the adding mechanism, thus throwing or taking out of the adding mechanism the subtrahend number. In case 125 the invention is used in a listing machine my invention embodies means for preventing listing of the subtrahend number or complement and also for preventing movement of the paper in line spacing, though it will be 180 understood that such portions of the invention may be omitted when the machine in which the invention is used is not a listing machine. I contemplate the use of the invention in machines of the non-listing type, and claim the invention as new whether extended to a listing machine or whether the parts that co-operate with the listing mechanism be present or not.

When it occurs that any item has been erroneously listed and included within the addition or calculations and such error is not discovered until after the completion of the listing and calculating operation of the machine, the error may be corrected by use of this invention. In such case the complement of the item erroneously listed and included within the additions and calculations is introduced into the differential mechanism of the machine by operation of the complementary numeral keys; with the exception that the digit in units order lacks 1 of being of sufiicient value, and with the further exception that the 9s in the higher numerical orders, above the highest numerical order of the subtrahend, need not be struck on the keys but will be automatically introduced into the calculation. After the complementary number to the extent mentioned is introduced into the differential mechanism the subtraction controlling device or key is operated as required to cause the mechanism of the present invention to function. after which the main shaft of the machine is operated in the usual way, and as a result thereof the error is corrected; and in the case of a listing machine, the subtrahend number or item in the list of items is appropriately designated by the printing of a character adjacent thereto for that purpose.

As shown the subtraction controlling device or key comprises a key 42 upon an appropriately formed lever 43 pivotally mounted on a shaft 44. The key 'lever 43 is held in its raised position by an appropriately connected spring 45 which is connected with the lever in such a -way as to return the lever to its raised position at the proper time. The subtracting key lever is held in its depressed or operative position as long as required by a latch device comprising a projection 46 on the lever which engages under a shoulder 47 formed on a latch member 48, when the lever is in its depressed position as shown i Fig. 6. A spring 49 connects the key lever 43 with the pivoted latch 48 so as to cause proper releasable latch engagement between said parts when the key lever is depressed. The latch 48 is supported upon a pivot 50 and has an extension 51 in the line of movement of an arm 52 (Fig. 8) on the rock shaft 23. As a result of this construction and arrangement the latch will-hold the lever 43 in its depressed position until the shaft 23 reaches the final operation of its forward turning movement. Just before the shaft 23 completes its forward turning movement the arm 52 on said shaft engages the extension 51 of the latch member and releases the latch, thereby permitting the lever 43 at the proper time to be raised to its normal position by its spring 45. As a result of the depression of the lever 43 the mechanisms of the present invention are caused to function when the shaft 23 is operated. I will now describe the means by which the full complement of the subtrahend is utilized to correct the error resulting from entering into the calculating and listing the erroneous item.

In the example shown in Fig. 9, the item 2457 was entered into the calculations and listed through error. This item should not have been entered into the'calculations and should not have been listed. In order to correct the error and remove this item from the calculations the complementary number for the number 2457, less 1, is set up in the differential mechanism by operation of the numeral keys in the usual way, after which the key lever 43 is depressed and latched in its depressed position, following which operation the machine is operated as though any ordinary item was being added and listed. The complementary number of the number 2457, less 1, is 7542 and, therefore, the number 7 542 is set up in the differential mechanism. After the complementary number has been set up in the differential mecha nism the key lever 43 is depressed, causing an arm 53 on said lever 43 to raise an arm 54 which is attached to a rock shaft 55 and which has a pin 56 engaging the arm 53. The rock shaft 55 supports an arm 57 from which a link 58 leads to the loWer arm of a lever 59 which is pivotally mounted on a support 60. The upper arm of the lever 59 is pivotally connected with the forward end of a link 61, and the rear end of said link is pivoted to an arm 62. The arm 62 is in connection with a plate 63 having projections extending into slots or openings in a support 64, whereby said arm 62 is pivotally supported. The arm 62 extends downwardly and forwardly above the usual stop or abutment plate 65 found in the Dalton adding machine for preventing operation of the type-carriers and racks above the highest numerical order of the number or item being used in any calculation.

In order to make complete correction of the number or item 2457, which had been erroneously entered into the calculations and listed, it is necessary to enter int-o the correoting calculation a 9 in each numerical order above the highest numerical order of the number that had been erroneously used. To permit the type-carriers and racks in the higher numerical orders to operate it is the plate'65 in such a way that when thekey lever 43 is depressed and the connections therefrom are operated, the arm 62 will press the plate 65 downwardly from the position shown in Fig. 7 to the position shown in Fig. 6. In the position shown in Fig. 6 the plate 65 isout of the way .of the shoulders 66 leaving the type-carriers and racks in higher numerical eorders free to move to recording position when the machine'is operated. In this way the necessary number of 9s are taken care of in the higher numerical orders, so as to clear the machine of the error.

As previously stated, it is necessary to enter into the calculation in units order a digit which is the full complement of the digit in units order in the error item. That is, it is necessary to enter into the calculation in units order a digit which added to the digit in units order in the error makes -10, so as to transfer 1 from units order to tens order, and transfer 1 from tens order to hundreds order, and transfer 1 from hundreds order to thousands order, and so on throughout the full capacity of the machine which, obviously, takes out or throws out and thereby corrects the error. As previously mentioned the number 7542, which had been set up in the differential mechanism as complementary to the error, lacks v1 in units order of being the full complement of the error number. To complete the full complement 1 is added into units order automatically and as an incident to operation of the machine in a substracting operation, so as to make the full complement of the error number. I will now describe the mechanism by which 1 is added into units order to make the full complement required.

In order to permit the transfer of l'into units order in addition to the digit set up in units order in the complement number as required to complete the full complement, the transfer pawl 29 in units order is raised from the usual position shown in Fig. 1 to the position shown in Fig. 5 to permit the units rack, which operates the units adding pinion, to move rearwardly as though a transferring operation was taking place from a lower numerical order, as in case of addition of fractions, in an example of addition. The device for raising the transfer pawl 29 for the units rack comprises a bell crank lever 67 pivoted on a support 68 and having a projection 69 on one arm thereof extending under the transfer pawl 29 that isv provided for the units rack. In order to raise the transfer pawl 29 controllingthe rack in units order it is only necess to operate the lever 67. For

this purpose provide an 'actuator'70 which, i 1

in case the invention is employed in an addlng, calculating and listing machine, may

for printing designating characters an be a type-carrier used to carry special typle for instance, as characters indicating a clear condition of the'machine, a character for designating items that had been listed by error, etc. As shown, the actuator 70 is a type-carrier. and carries special type 71 for printing designatin characters and arranged to be riven %y a special one of the hammers 7. The actuator. 70 supports a projection .72 which may be caused to engage with and operate the lever 67 as required to raise the transfer pawl 29 controlling the units rack; The actuator 70 is held from operation when the machine is .being operated in ordinary adding and calculating operations not involving subtraction or other special operations. For preventing operations of the actuator 70 beyond a slight extent of movement a projection 73 is provided on said actuator and arranged to engage a shoulder 7 4 on a pivotally supported stop member 75. As shown (Fig. 4) the projection 73 and the stop 74 are arranged relative to each other in order to permit slight movement of theactuator 70 which, in the form shown, is a typecarrier. Provision is made for this movement. in order to permit the type-carrier to move far enough to place the uppermost type thereon in proper position relative the printing line. Such movement of the actuator 70 is insuflicient to cause operation of the lever 67. In order to cause operation of the lever 67 as required to raise the transfer pawl 29 in units order, it is necessary to move the pivoted stop member 7 5 to place a shoulder 76 on said stop member in position to be engaged by the projection 73. Such movement of the actuator 70 is suflicient to cause the projection 72 to operate the lever 67, resulting in the raising of the transfer pawl 29 in units order and per-' mitting the rack in units order to be moved rearwardly by its spring 27 a distance sufiicient to carry or to transfer 1 into units order. This will complete the introduction into the calculation of the full complement of the item that had been erroneously entered-into the calculation and listed.

The stop member is moved to adjusted position to permit movement of the combined type-carrier and actuator 70 as shown, to trip the transfer pawl 29 and to position the proper type for printing a designating character adjacent to the erroneous item, as an incident to operation of the key lever 43. An arm 77 (Figs. 4 and 5) in connection with the key lever 43 extendsv behind a projection 78 on a link 79 so that when the key lever is operated the link 79 will be moved in a forward direction. The forward end of the link 79 is supported by a pin and slot construction 80, and the rear end of said link is pivoted to a depending arm in connection with the stop member 75. The stop member 75 is thereby operated from the position shown in Fig. 4 to a position in which the. shoulder 76 is in the line of movement of the projection 73, thus permitting the actuator and type-carrier to move to the position shown in Fig. 5. \Vhen the key lever 43 is released from the latch member 48 as before described and returns to its normal position, the link 79 and the stop member are returned to their normal positions. Means for effecting the return of the link 79 and the stop member 75 to their normal positions is shown, the same comprising a spring 81 (Fig. 1) connecting the link with a stationary part.

As before stated the latch release bar 16 is held in position to prevent the shoulders 15 on the hammer latches from rising in front of the latch bar whenever the machine is operated to perform subtraction. The latch release bar is held from movement during the subtracting operation by a retaining device or abutment comprising a bifurcated member 82 embracing the latch release bar 16 between the arms thereof (Figs. 2, 5 and 6) and having its rear end pivotally connected with the upper arm of the lever 59. As before explained and as clearly shown in Fig. 5, the upper arm of the lever 59 is moved to and held in a forward position by the depression of the key lever 13 Such forward movement of the upper arm of the lever 59 is sufficient to hold the latch release bar 16 from movement when the machine is operated to perform subtraction. Since the normal or idle position of the latch release bar 16 is above the shoulders 15 it follows that the shoulders cannot rise in front of the release bar, when the type-carriers move as required to perform the subtracting operation before described. As a consequence of this printing of the complementary number of the error item is automatically prevented. However, the latch for the hammer cooperating with the type-carrier 70 is released at the proper time during the subtracting operation in order to effect printing of the designating character 83 (Fig. 9) adjacent to the item that had been erroneously entered into the calculation and listed, in order to give visual indication of the fact that such item has been taken out of and excluded from the calculation.

The means for preventing operation of the paper feed or line space mechanism is also operated as an incident to the use of the machine in asubtracting operation. Said means comprises a device for preventing movement of the lever 34 (Figs. 1, 2 and 8) far enough to en age the pawl 31 with the ratchet wheel 30. As shown, said device comprises an arm 84, which may be a part of the lever 59. The arm 84; is provided with a part 85 which is moved into line of movement of a projection 86 on the lever 34, thus stopping movement of said lever 34 short of the position in which the pawl 31 may be engaged with the ratchet wheel 30. Since the pawl does not engage the ratchet wheel the platen will not be turned and the paper will not be moved, but will be held stationary.

From the foregoing it will be seen that my invention comprises mechanism for conveniently performing subtracting operations by use of an adding and calculating machine, involving the process of adding the complementary numbers of the items that had been erroneously entered into the calcu-' lations. The invention is complete to that extent when used in a non-listing machine. However, when the invention is used in a listing machine the invention also comprises mechanism for preventing printing of the complementary numbers and for preventing the line spacing of the paper during the process of subtraction, including means for printing a designating character adjacent to the erroneous items.

I contemplate such variation of the invention as may adapt it for use in different types of machines and donot restrict myself to unessential features or limitations.

hat I claim and desire to secure by Letters Patent, is

1. In a machine of the character described, the combination of type-carriers, type on said type-carriers, spring actuated hammers for driving the type on said type-carriers to print, a latch for holding each of said ham mers in a retracted position, a bail device for releasing latches corresponding to the type-carriers in recording position, and means for preventing effective operation of said bail device, leaving all latches holding corresponding hammers when any of the type-carriers operate irrespective of the positions to which the type-carriers move.

2. In a machine of the character described, the combination of type-carriers, type on said type-carriers, spring actuated hammers for driving the type on said type-carriers to print, a latch for holding each of said hammers in a retracted position, a movable bar for releasing all latches corresponding to the type-carriers in recording positions, mechanism for moving said bar, and a settable device for preventing efiective movement of said bar and thereby preventing release of any latches corresponding to operated typecarriers when any of the type-carriers operate.

3. In a machine of the character described, the combination of type-carriers movable to and from recording positions, type on said type-carriers, hammers for driving the type on the type-carriers to print, latches .for holdin the hammers retracted, a bail device for refiaasing the latch members from the hammers corresponding to the type-carriers in recording positions,, means forimoving said device and said latch members as required to effect engagement between the latch members and said device, and means for preventing engagement of any of said latch members and said device which would enable said device to release said latch mem- 1 bers as desired, when the type-carriers are operated in subtracting operations as de-. scribed.

4. In a machineof the character described, a series of type driving hammers, a series of latches for holding said hammers in retracted positions, a bar, a stationary support to which said bar is pivoted, means for moving selected ones of said latches into position to be engaged by said bar ,a lever for oscillating said bar to release said latches from said hammers, and means for preventing operation of said bar from releasing said hammers.

5. In a machine of the character described, a series of type driving hammers, a series of latches for holding said hammers in retracted positions, shoulders on said latches, a pivoted bar, means for moving selected ones of said latches into position to enable said bar to engage said shoulders, mechanism for operating said bar to release said latches from said hammers after said latches have been moved as aforesaid, and means for preventing operation of said barto release said latches from said hammers.

6. In amachine of the character described, a series of type-carriers movable to and from recording positions, type on said type-carriers, a stop member for preventing movement of said type-carriers, connections for moving said stop member to position to permit the type-carriers to move to recording positions, hammers for driving the type on said type-carriers to record, latches for holding said hammers retracted, a movable bar for releasing said latches from said hammers, and means controlled by said connections for preventing said bar from releasing said latches from said hammers, when said connections are in position to permit the type-carriers to operate.

7 In a machine of the character-described, a series of type-carriers movable to and from recording positions, type on said typecarriers, a stop member for preventing movement of said type-carriers, a lever for moving said stop member to position to permit the type-carriers to operate, connections for operating said lever, a series of hammers for driving the type on said type-carriers to record, latches for holding the hammers retracted, a swinging bar for releasing the latches from the hammers, and a device con; trolled by said connections that'operate said lever for preventing said bar from releasing the latches from the hammers.

' 8. In a machine of the character described, the combination of a series of type driving hammers, movable latches for holding said hammers retracted, a bar extending across all of the latches for releasing varying numbers of said latches from said hammers, an abutment for preventing effective movement of said bar, and means for moving said abutment to and from position in which it will prevent effective movement of said bar.

9. In a machine of the character described, the combination with type driving hammers, latches for holding the hammers in retracted positions, a bar extending across all of the latches for moving varying numbers of said latches to release said hammers, and mechanism for operating said bar to release varying numbers of said latches from said hammers, of an abutment movable to and from position to prevent effective operation of said bar, a lever for moving said abutment, and manipulative connections for operating said lever.

10. In a machine of the character described, the combination with type driving hammers, latches for holding the hammers in retracted positions, a bar for moving said latches to release said hammers, and mechanism for operating said bar to release said latches from said hammers, of an abutment movable to and from position to prevent effective operation of said bar, a lever for moving said abutment, manipulative connections for operating said lever, and a latch device for holding said connections and thereby said. lever to retain said abutment I in position to prevent effective operation of I said bar.

' 11. In a machine of the character described,

a series of type driving hammers, latches holding said hammers retracted, a support, 7

etl'ective operation of said bar to prevent said bar from releasing said latches as desired.

12. In a machine of the character described, a series of type driving hammers, latches holding said hammers retracted, type movable tolandfrom position to cooperate with said hammers, a stop for preventing movement of said type to position to cooperate with said hammers, connections for moving said stop to position to permit the type to move to cooperate with the hammers, a bar for releasing the latches to permit the hammers to operate, means for moving said bar to release said hammers, and means con trolled by said connections for preventing effective movement of said bar.

13. In a machine of the character described, a series of type-carriers, type on said type-carriers, a stop for preventing movement of said type-carriers, a lever for moving said stop to position to permit the type-carriers to operate, key mechanism, connections from said key mechanism to said lever for operating said lever by said key mechanism, hammers for cooperating with the type on the type-carriers to record, automatic means for operating said hammers as an incident to operation of the type-carriers, and means controlled by said connections for preventing operation of said hammers.

1 1. In a machine of the character described, a series of type driving hammers, a series of latches holding said hammers retracted, a stationary support, a bar extending across the series of latches and having one end pivoted on the stationary support, a lever in connection with the opposite end of said bar, mechanism for operating said lever and thereby said bar to release the latches from the hammers, and means for preventing eiiective operation of said bar.

15. In a machine of the character described, a series of type-carriers, type on said type-carriers, a series of type driving hammers for cooperating with the type on the type-carriers to record, a series of latches holding the hammers retracted, a stationary support, a bar extending across the series of latches and having one end pivoted on the stationary support, mechanism for oscillating the opposite end of said bar for releasing the latches from the hammers corresponding with the type-carriers which operate, and means for preventing effective operation of said bar by said mechanism and thereby preventing release of the latches from the hammers when the typecarriers operate.

16. In a machine of the character described, a series of type driving hammers, a series of latches for holding the hammers retracted, a bar extending across the series of latches, mechanism for operating said bar to release said latches from said hammers, and a device for holding said bar from operation to prevent effective movement of said bar bysaid mechanism.

17. In a machine of the character described, type-carriers, type on said typecarriers, hammers for driving the type on the type-carriers to record, latches holding said hammers retracted, a bar operable to release said latches from said hammers, means for operating said bar, a platen, means for operating said platen to feed paper to receive the records from the type on said typecarriers, a lever, means for operating said lever, and devices operated by said lever to prevent said bar from releasing said latches and to prevent operation of said platen.

18. In a machine of. the character described, the combination with a revoluble platen for feeding paper, a pawl for rotatmg sa d platen in line spacing, a lever for operatlng said pawl, type for printing on the paper on said platen, hammers for drivmg the type to print, latches holding the hammers retracted,'a bar for releasing said latches, and means for operating said bar to release said latches, of a key lever, a device operated by said key lever to prevent effective operation of said bar and thereby preventing release of said latches, and a dev1ce operated by said ktfi lever for preventmg operation of said first-named lever to operate said pawl.

19. In a machine of the character described, a platen operable to feed paper, a pawl for. rotating said platen, a lever for operating said pawl, type driving hammers, latches holding said hammers retracted, a device for releasing said latches, and manipulative mechanism settable to prevent said bar from releasing said latches and to prevent said lever from operating said pawl.

20. In a machine of the character described, a platen operable to feed paper, a pawl for rotating said platen, a lever for operating said pawl, type driving hammers, latches holding said hammers retracted, a. device for releasing said latches, manipulative mechanism settable to prevent said bar from releasing said latches and to prevent said lever from operating said pawl, and a latch holding said manipulative mechanism in position to prevent effective operation of said bar and said lever.

21. In a machine of the character described, a platen, a ratchet wheel in connection with the platen, a rock shaft, a pawl supported by said rock shaft and movable into and out of engagement with said ratchet wheel to operate said platen, a lever for rocking said shaft, a spring for actuating said lever to turn said shaft in one direction, a bell crank lever for actuating said first-named lever to turn said shaft in the opposite direction and to hold said firstnamed lever in one position, means for operating said bell crank lever, and a device settable to prevent said first-named lever from operating to effect engagement of said pawl with said ratchet wheel when said bell crank lever is operated.

22. In a machine of the character dedescribed, a revoluble platen, a ratchet wheel in connection with the platen, a shaft, a pawl supported by the shaft, a lever for rocking the shaft to move the pawl into and out of engagement with the ratchet wheel said lever in one direction, a rock shaft, a' device for movlng said lever mopposltion to sa1d spring, connections from said rock shaft for operating said device to permit said spring to operate said lever and to move said lever to its starting point in opposition to said spring, and an element settable to limit movement of said lever to prevent the pawl from becoming engaged with" the ratchet wheel. 23. In a machine of the character described, a laterally movable paper carriage, a platen in said carriage, a ratchet wheel in connection with the platen, a rock shaft supported in the carriage, a pawl operated by the rock shaft to engage with said ratchet wheel to turn the platen, a lever slidable upon the rock shaft and being operable to rock said shaft, an operating shaft, connections operated by the operating shaft for actuating said lever in one direction and holding said lever in its normal position,

a stop for limiting movement of said lever to prevent rotation of the platen, and means for setting said stop in position to limit movement of said lever.

24. In a machine of the character described, a platen, platen rotating mechanism, type driving hammers, latches hold- I in the hammers retracted, and a bar operab e to release the latches from the hammers, in combination with a manipulative lever, connections operated by said lever, a device operated by said connections to prevent operation of the platen rotating mechanism, and an additional device operated by said connections to prevent said bar from operating to release said latches.

25. In a machine of the character described, a platen, platen rotating mechanism, type driving hammers, latches holding the hammers retracted, and a bar operable to release the latches from the harnmers, in combination with a manipulative lever, connections operated by said lever, a device operated by said connections to prevent operation of the platen rotating mecha nism, an additional device operated by said connections to prevent said bar from operating to release said latches, and a device for holdin said manipulative lever in position in which said connections will be held in operated position.

26. In a machine of the character described, a platen, platen rotating mecha-- connections to prevent said bar from oper-' holding said manipulative lever in position in wh1ch said connections will be held in operated position, adding mechanism, an d means for releasin said device as an 111C1- dent to operatic 9% said adding mechanism.

27. In a mac no of the character described, adding mechanism, a stop for preventing operation of said adding mechanism, recording mechanism operable with the adding mechanism, paper feed mecha nism for feeding paper to the recording mechanism, means for operating the paper feed mechanism automatically as an incident to operation of the recording mechanism, hammers for cooperating with the recording mechanism, latches holding the hammers retracted, and a device operable to release said hammers automatically as an incident tooperation of the recording mechanism, in combination with a manipulative device, and elements operated by said manipulative device to position said stop to permit operation of the adding mechanism, and to prevent operation of the operatin means for the paper feed mechanism an to prevent said device from releasing said hammers.

28. In a machine ofthe character described, adding mechanism, a-stop for preventing operation of said adding mechanism, recording mechanism operable with the adding mechanism, paper feed mechanism for feeding paper to the recording mechanism, means for operating the paper feed mechanism automatically as an incident to operation of the recordlng mechanism, hammers for cooperating with the recording mechanism, latches holding the hammers re- 1 tracted, and a device operable to release said 29. In a machine of the character described, adding mechanism, a stop for preventing operation of said adding mechanism, recording mechanism operable with the adding mechanism, paper feed mechanism for feeding paper to the recording mechanism, means for operating the paper feed mechanism automatically as in incident to operation of the recording mechanism, hammers for cooperating with the recording mechanism, latches holding the hammers retracted, and a device operable to release said hammers automatically as an incident to opera-l tion of the recording mechanism, in combination with a manipulative device, elements operated by said manipulative device to position said stop to permit operation of the adding mechanism, and to prevent operation of the operating means for the paper feed mechanism and to prevent said device from releasing said hammers, an element for holding said manipulative device in an adjusted position to cause the aforesaid elements to function as stated, and means operated during the operation of the adding mechanism to release said holding element.

30. In a machine of the character described, the combination With paper feed mechanism, type driving hammers, latches for holding the hammers retracted, and a device for releasing the latches from the hammers, of a stop settable to prevent operation of the paper feed mechanism and to prevent operation of said device which releases the latches, and means for setting said stop in position to prevent operation of said paper feed mechanism and said latch released device. a

31. In a machine of the character described, the combination with paper feed mechanism, type driving hammers, latches for holding the hammers retracted, and a device for releasing the latches from the hammers, of a stop settable to prevent operation of the paper feed mechanism and to prevent operation of said device which releases the latches, means for setting said stop in position to prevent operation of said paper feed mechanism and said latch release device, and an element for holding said setting means in set position.

32. In a machine of the character described, the combination with paper feed mechanism, type driving hammers, latches holding the hammers retracted, and a device for releasing the latches from the hammers, of a stop for preventing operation of the paper feed mechanism, an additional stop for preventing operation of the latch release device, a rock shaft, a connection from said rock shaft for operating said stops to position to prevent operation of the paper feed mechanism and the latch release device, and a manipulative element for turning said rock shaft in a direction to set said stops.

33. In a machine of the character described, the combination with paper feed mechanism, type driving hammers, latches holding the hammers retracted, and a device for releasing the latches from the hammers, of a stop for preventing operation of the paper feed mechanism, an additional stop for preventing operation of the latch release device, a rock shaft, a connection from said rock shaft for operating said stops to position to prevent operation of the paper feed mechanism and the latch release device, a manipulative element for turning said rock shaft in a direction to set said ,stops, a latch for holding said manipulative device in the position to which it is operated, means for releasing said latch from said manipulative device, and an actuator for moving said manipulative device to its starting point and thereby' turning said rock shaft in the opposite direction to move said stops to position to permit operation of the paper feed mechanism and the latch release device.

34:. In a machine of the character described, the combination with type-carriers movable to and from recording position, a stop for preventing movement of the type carriers-to recording position, type on the type-carriers, paper feed mechanism operable as an incident to operation of the typecarriers to feed paper in line spacing, hammers for driving said type to record on the paper, latches holding the hammers retracted, and a device for releasing latches from the hammers corresponding to the typecarriers which operate, of a manipulative lever, connections operated by said lever for moving said stop to position to permit the type-carriers to move to recording posi tion, a device operated by said lever to pre vent operation of the paper feed mechanism during the time that said stop is in position to permit said type-carriers to move to recording position, and means operated by said lever to prevent operation of the latch release device; leaving said type-carriers free to operate while the paper feed mechanism remains inoperative and while the latches remain in engagement with the hammers.

35. In a machine of the character described, the combination with type-carriers movable to and from recording a stop for preventing movement carriers to recording position, type-carriers, a

of the typetype on the paper feed mechanism operle as an incident to operation of the typeposition,

carriers to feed paper in line spacing, hammers for driving said type to record on the paper, latches holding the hammers retracted, and a device for releasing latches from the hammers corresponding to the type-carriers which operate, of a manipulative lever, connections operated by said lever for moving said stop to position to permit the typecarriers to move to recording position, a device operated by said lever to prevent operation of the paper feed mechanism during the time that said stop is in position to permit said type-carriers to move to recording position, means operated by said lever to prevent operation of the latch release device; leaving said type-carriers free to operate while the paper feed mechanism re mains inoperative and while the latches remain in engagement with the hammers; and

adding mechanism operated under control of the type-carriers.

36. In a machine of the character described, the combination with a series of type-carriers movable to and from record ing position, a stop for preventing movement of the type-carriers to recording position, type on the type-carriers, paper feed mechanism operable as an incident to operation of the type carriers to feed paper in line spacing, hammers for driving said type to record on the paper, latches holding the hammers retracted, a device for releasing the latches from the hammers correspond ing to the type-carriers which operate, a series of adding pinions, racks associated with the series of type-carriers aforesaid for operating said adding pinions in adding and transferring operations, an abutment controlling the transfer operations of one of said racks, and a device operable to print a designation of the fact that such transfer operation had occurred,'of a manipulative lever, and connections operated by said lever to move the said stop to position to permit,

said type-carriers to move to recording position, to prevent operation of the paper feed mechanism during the time that said stop is in position to permit said type-carriers to move to recording position, to prevent operation of said latch release device, to

position said abutment to permit transferoperation of one of said racks, and to cause the operation of said printing device to print itsdesignation.

37. In a machine of the character described, the combination with a series of type-carriers movable to and from recording position, a stop for preventing movement of the type-carriers to recording position, type on the type-carriers, paper feed'mechanism operable as an incident to operation of the type-carriers to feed paper in line spacing, hammers for driving said type to record on the paper, latches holding the hammers retracted, a device for releasing latches from the hammers corresponding to the type-carriers which operate, a series of adding pinions, racks associated with the series of ty ecarriers aforesaid for operating said adding pinions in adding and transferring operations, and an abutment controlling the transfer operations of one of said racks, of a manipulative lever, connections operated by said lever for moving said stop to position to permit the type-carriers to move to a recording position, other connections operated by Said lever for adjusting the said abutment to permit transfer operation of the corresponding rack, adevice operated by said lever to prevent operation of the paper feed mechanism during the time said stop is in position to permit said type-carriers to move to recording position, and means operated by said lever to prevent operation of the latch release device; leaving said type-carriers free to operate while the paper feed mechanism remains inoperative and while the latches remain in engagement with the hammers.

38. In a machine of the character described, the combination with a series of type-carriers movable to and from record: ing position, a stop for preventing movement of the type-carriers to recording position, type on the type-carriers, mechanism for feeding paper to receive records from the type, hammers for drivin the type to record on the paper, means or operating said hammers, a series of adding pinions, racks associated with the type-carriers for operating the adding pinions in adding and transferring operations, an abutment controlling the transfer operations of one of said racks, and mechanism for printing a designation of the fact that such transfer operation had occurred, of a manipulative lever, and connections operated by said lever for moving said stop to position to permit said typecarriers to move to recording position, and for preventing operation of the paper feed mechanism, and for preventing operation of said hammers, and for positioning said abutment to permit transfer operation of the rack controlled thereby, and for causing said printing device to print said designation to indicate the fact that such transfer open ation had occurred.

HARRY DLANDSIEDEL. 

